engel



(No Model'.)

L. G. ENGEL.

VALVE.

Patented July 14, 18 85,

lNvENTORz WITNESSES.-

UNITED STATES PATENT OFFICE.

LOUIS e. ENGEL, or TILLY FOSTER, NEW YORK.

VALVE.

@IECIE'ICATION forming part of Letters Patent No. 322,270, dated July14-, 1885.

Application filed May 6, 1884.

To all whom it may concern.-

Be it known that I, LOUIS G. ENGEL, acitizen of the United States,residing at Tilly Foster, in the county of Putnam and State of. NewYork, have invented certain new and useful Improvements in Valves, ofwhich the following, in connection with the accompanying drawings, is aspecification.

My invention relates to improvements in valves, and is more especiallyapplicable to disk-valves of rubber or other suitable material-such, forexample, as are used in the ordinary forms of steam-pumps. ,Disk-valvcsas ordinarily constructed will lift at each stroke of the pump and beseated with considerable force in exactly the same position. The gridforming the seat of the valve will thus wear the disk of rubber or othersoft material unequally and cause considerable loss in the effieiency ofthe pump and necessitate frequent renewal of the valve-disk.

The object of my invention is to provide a simple and effective devicefor rotating the valve slightly at each lift, thus seating the valve ina different position each time, and thereby securing even wear on theface of the valve-disk. I attain these objects by the use of themechanism illustrated in the accompanying drawings, in which Figure 1represents a vertical central section through valve with its rotatingdevice and valve-seat. Fig. 2 shows a plan view of the valve-seat, partbeing in section along line at m, Fig. 1, the valve itself beingremoved.

In the drawings, at A is shown the grid forming the ordinary valve-seat,which can be made either directly in valve-plate or as a separateremovable piece fitting along a groundjoint or by screw-thread, as shownby dotted lines. From the center of this grid is supported the valvestemB, secured by screwthread at its lower end, and provided with abolt-head for its easy removal. The valvestem is provided with one ormore spiral grooves, 11, forming a rifle-bar having a very long thread.Around this valve-stem fits the conical nut G, having an internal spiralthread, I), Fig. 2, corresponding to the groove 7) in valve-stem B. Theconical nut C can move up and down freely on stem B, and will be guidedby the spiral groove 1). The rubber or other suitable disk, D, formingthe valve, is

' backed by the metallic plate E, having conical seat 6 fitting conicalsurface a of nut O.

(No model.)

The valve D is held to its seat by spiral spring H, pressing against themetallic plate The upper end of the spring presses against the,

against the cone 0 of nut O and rotates with it. As soon asthe refluxbegins, the plate E,

due to spring H, falls away from the nut O, and the valve seats itselfin a different-post tion. The nut O, fitting loosely around stem B,follows the plate E by its weight along spiral groove b, and will at thenext lift of the valve again rotate the same. of the pump the valve willthus be rotated slightly. The valve will thus seat in a differentposition each time, and thereby eauseit to wear evenly. 4

I have shown the angle of the cone 0 as about forty-five degrees. Thisof course canbeinade more or less, according to circumstances. Likewisethe pitch of the thread or groove 1) can be varied within considerablelimits. If desired, the thread or groove can be cut in nut C, andcorresponding projecting rib formed on stem B.

At each stroke I have shown the valve as formed of two 1. Thecombination, with a valve, of a nut or disk having spiral guides, saidnut being free to move vertically along said spiral guides When usingsuitable material, the

and placed above and resting on said valve,

substantially as and for the purposes described.

2. The combination, with a valve, of a fixed valve'stem provided withspiral guides, anda nut placed above said valve engaging with saidspiral guides, along which it is' free to move vertically, substantiallyas and for the purpose described.

3. The combination, with the valvestem B,

having spiral groove 1), of a conical nut, 0,

having internal thread, I), valve D E, and

spring H, substantially as and for the purpose specified.

\Vitnesses: LOUIS G; ENGEL.

H. .HOLLERITH,

S. G. METOALF.

